package ch7_14;

class Engine{
	public void start(){}
	public void rev(){}
	public void stop(){}
	public void service()
	{
		System.out.println("Can I help you!");
	}
}
class Wheel{
	public void inflate(int psi){}
}
class Window{
	public void rollup(){}
	public void rolldown(){}
}
class Door{
	public Window window = new Window();
	public void open(){}
	public void close(){}
}
public class Car{
	public Engine engine = new Engine();
	public Wheel[] wheel = new Wheel[4];
	protected Engine service = new Engine();
	public Door
	   left = new Door(),
	   right = new Door(); // two door
	public Car()
	{
		for(int i = 0; i < 4; i++)
			wheel[i] = new Wheel();
	}
	public static void main(String[] args)
	{
		Car car = new Car();
		car.left.window.rollup();
		car.wheel[0].inflate(72);
		car.service.service();
	}
}

















